Find the Value of Cos 225

Answer:

.-0.7071067 is the value of cos 225 degrees. In radians, cos 225 degrees is written as cos (225°/180°), i.e. cos (5/4) or cos (3.926990. . .). 

• In fraction form, cos 225° is -(1/2)
• -0.7071067 is value of Cos (-225 degrees)
• cos (225°) in radians is cos (5 π /4) or (3.9269908 . . .)